Convenient 12 pack; (6) 2 pack
Provides mechanical filtration of large particles
Prevents premature clogging
Enhances biological filtration
Fluval Aquarium Filter Foam Blocks provide mechanical straining of particulate waste. It prevents particulate waste from prematurely clogging other filter media in the module stack. Although the primary purpose of Fluval Foam is mechanical filtration, biological activity will eventually occur within its pore structure. These Fluval Aquarium Filter Foam Blocks also enhance biological filtration and are suitable for the Fluval 404, Fluval 405, Fluval 406 Aquarium Filters.
Fluval Foam Filter Block A226 - For 404/405/406 12-Pack - Retail OEM - B00NWVZ2RA